Rolex
Datejust 36 126203-0046— lug 20mm

The Rolex Datejust 36 reference 126203-0046 has a lug width of 20 mm. This measurement is taken internally between the two lugs using a calliper at the point where the strap or bracelet attaches. All aftermarket straps must conform to this dimension at the lug end.

For the yellow Rolesor two-tone combination of the 126203-0046, alligator leather in midnight blue or cognac brown provides the most coherent pairing with the watch's formal register. Shell cordovan offers a smooth surface with a long-lasting patina. For sporting or summer use, vulcanised rubber is the most practical option while maintaining the case's water resistance.

To replace the strap or bracelet on the Datejust 36, a fine-tipped spring bar tool or dedicated screwdriver is required to release the spring bars from the lugs. Nylon or fabric protectors are recommended to avoid scratching the Oystersteel lugs or gold-toned components. If in doubt, it is advisable to consult a watchmaker or the Casati Milano atelier.

Yes. The aftermarket offers compatible straps in 20 mm produced in high-quality materials, including alligator, shell cordovan, vegetable-tanned calf leather and rubber. Milano Straps and Casati Milano craft bespoke straps compatible with the Datejust 36 lugs, with curved ends to ensure a proper fit against the curved lugs of this model.

Longevity depends on the leather type and frequency of use. A quality alligator strap, properly maintained, retains its structure and appearance for 3–5 years with daily wear. Shell cordovan is notably more resistant to deformation at the keeper loop. Vegetable-tanned leather develops a patina over time but requires periodic conditioning. Avoiding prolonged contact with water and perspiration significantly extends strap life.